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Share-based Compensation (Stock Option Activity) (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Feb. 03, 2018
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Outstanding as of Beginning of Period, Number of Shares | shares 5,439
Granted, Number of Shares | shares 1,163
Exercised, Number of Shares | shares (1,845)
Cancelled, Number of Shares | shares (285)
Outstanding as of End of Period, Number of Shares | shares 4,472
Vested and Expected to Vest as of End of Period, Number of Shares | shares 4,316 [1]
Options Exercisable as of End of Period, Number of Shares | shares 2,202
Outstanding as of Beginning of Period, Weighted Average Option Price Per Share | $ / shares $ 47.17
Granted, Weighted Average Option Price Per Share | $ / shares 47.12
Exercised, Weighted Average Option Price Per Share | $ / shares 20.70
Cancelled, Weighted Average Option Price Per Share | $ / shares 63.62
Outstanding as of End of Period, Weighted Average Option Price Per Share | $ / shares 57.03
Vested and Expected to Vest as of End of Period, Weighted Average Option Price Per Share | $ / shares 57.03 [1]
Options Exercisable as of End of Period, Weighted Average Options Price Per Share | $ / shares $ 50.05
Outstanding as of End of Period, Weighted Average Remaining Contractual Life 6 years 193 days
Vested and Expected to Vest as of End of Period, Weighted Average Remaining Contractual Life 6 years 161 days [1]
Options Exercisable as of End of Period, Weighted Average Remaining Contractual Life 4 years 263 days
Outstanding as of End of Support, Aggregate Intrinsic Value | $ $ 18,313
Vested and Expected to Vest as of End of Period, Aggregate Intrinsic Value | $ 18,265 [1]
Options Exercisable as of End of Period, Aggregate Intrinsic Value | $ $ 17,489
[1] The number of options expected to vest includes an estimate of expected forfeitures.